You can't treat tannins and sediment runoff the same. The problems with
sedimentation from agriculture, development, etc, are only slightly from the
increased load and turbidity. The real problems are from the effects on the
stream bed-- these small particles fill in spaces in the substrate needed to
support invertebrate life, fish spawning, fry protection, etc. So shake
that fist and wave that finger if the person causing the problems knows
better but refuses to do anything differently.
-- Jay DeLong Olympia, WA /----------------------------------------------------------------------------- /"Unless stated otherwise, comments made on this list do not necessarily / reflect the beliefs or goals of the North American Native Fishes / Association" / This is the discussion list of the North American Native Fishes Association / nanfa_at_aquaria.net. To subscribe, unsubscribe, or get help, send the word / subscribe, unsubscribe, or help in the body (not subject) of an email to / nanfa-request_at_aquaria.net. For a digest version, send the command to / nanfa-digest-request_at_aquaria.net instead. / For more information about NANFA, visit our web page, http://www.nanfa.org